Mechanical movement and bed-motion for cylinder printing-machines.



Patented Feb. 4, I902.

E. F. LEILICH. MECHANICAL MOVEMENT AND BED MOTION FOR CYLINDER PRINTINGMACHINES.

7 Application filed May '7, 1901..

(No Model.)

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No. 692,679. Patented Feb. 4. I902.

E. F. I.EILICH. I MECHANICAL MOVEMENT AND BED MOTION FOR CYLINDERPRINTING MACHINES.

(Application filed May 7, 1901.I

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(No Model.)

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(No Model.)

' Patented Feb. 4, 1902.

E. F. LEIL ICH. MECHANICAL MOVEMENT AND BED liOTION FOR GYLIND(Applicfitibn filed May '7, 1901.)

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Patented Feb'. 4, I902.

No. 692,679. I v E. F. LEILICH.

MECHANICAL MOVEMENT AND BED MOTION FOR CYLINDER PRINTING MACHINES.

(Application filed May 7, 1901.!

I I 7/ ////////AZ/ V/ ////7///// .I f I I III. .IIIIIuIIIlI IIIIIIIIIIIIIIII|III|I UNITED STATES PATENT OFFICE.

EDWIN FRANCIS LErnIon, OFSALN FRANCISCO, CALIFORNIA.

MECHANICAL Mlli/EMl-INT AND BED-MOT ION FOR CYLINDER PRINTING-MACHiNES.

SPECIFICATION forming part of Letters Patent No; 692,679, dated.February 4, 1902.

' Application filed May 7, 1901. Serial No. 59,181. (No model.)

To all whom it may concern:

Beitknown that LEDWIN FRANCIS LEILICH, a citizen of-the United States,residing at San Francisco, in the county of San Francisco and State ofOalifornia,have invented certain new and useful Improvements inMechanical I Movements and Bed-Motions for Cylinder Printing-Machines,of which the following is a specification.

My invention relates to an improved mechanical movement and bed-motionfor cylinder printing-machines, the object of myinvention being toprovide an apparatus of this character in which, 'so far as possible,the shock and jardue to the sudden stoppage of the printing-bed at eachend 'of the stroke shall be done away with.

Cylinder printing-beds with the forms thereon are often of great weight,and the rapid stoppage of this heavy body moving with considerablevelocity tends at each end of the stroke toliftthe press at the otherend and to cause strain on the parts and vibration of the press. Iremove this vibration and jar by causing a heavy weight to movesynchronously with the printing-bed, but in the opposite direction, atthe same velocity there'- With. The force or momentumtransmitted to theframe by the stoppage of the printingbed moving in the one direction isthus neutralized by the force or momentum transmitted by the stoppageofan equal body movingin the opposite direction with'the same velocity.

Since my invention is a new mechanical movement, it will be equallyapplicable to other machinery besides printing-presses, in which a heavybody makes rapid reciprocations, and I desire to claimthe same inconnection with all such machinery.

My invention therefore resides in the novel construction, combination,and arrangement of the parts for the above ends, hereinafter fullyspecified, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view of a printing-bedconstructed in accordance with my invention. Fig. 2 is a. side elevationof the same. Fig. 3 is a detail in cross-section of the end of theweight, showing theauxiliary weights in position. Fig. 4

is an enlarged perspective view of a portion of the press. Figs. 5, 6,and 7 are details showing the positions of the segmental gear anddriving-gear relatively to the upper and lower weight-racks and upperand lower auxiliary racks when approaching the end of a stroke, when attheend of thestroke, and when beginning the next stroke, respectively.These views show the opposite side of the mechanism'to that shown inFig. 2. Fig. Sis a crosssection of the apparatus on one side of thedriving-gear. Fig. 9 is an end view of the cylinder which carries thedriving-gear. Fig. 10 is a sectionof the same. Fig. 11 is a verticalsection on the line A A of Fig. 8 looking in the same direction of thearrow. Fig.

12is a vertical section on the line B B of Fig.

8 looking in the same direction of the arrow, and Fig. 13 is a-brokenend view of the weight.

Before describing the apparatus in detail it will assist inunderstandingthe nature of the invention to first describe the same in generalterms.

, The movements which must beobtained are a generalreciprocatin'gmovement of the printing-bed and a simultaneous and equal reciprocationin the opposite. direction of a weight or counterbalance of. about thesame weight as the printing-bed' These movements have to be derived fromthecontinuous revolution of the shaft. To accomplish this result, themotion of the printing-bed is derived from the rotation of the shaftindirectly Next, as to the derivation of the reciprocation of the weightfrom the continuous revolution of the driving-shaft. This isaccomplished by providing upper and lower oppositely-facing racks on theweight, arranged to mesh alternately with a continuously-revolvingdriving gear-wheel on the stud-shaft. A cam 30 is suitably connected tothe gear-wheel 31 and is used to bring the driving gear-wheelalternatelyinto engagement with the upper and 'lower racks.

ICU

Referring to the drawings for a more detailed description, it will beseen that 1 represents the main driving-shaft. From said shaft power isderived through a gear-wheel 2 thereon to reciprocate the printing-bedand weight, and through a pinion 3 is obtained power to operate the camwhich disengages the driving-gear from one of the weight-racks andcauses it to engage with the other. The gear-wheel 2 meshes with thedriving gearwheel 4, which is mounted on a stud-shaft 5, placedeccentrically on the end of a cylinder 6, the latter having a pivotalbearing in the frame 7. Supposing that the wheels 2 and at are moving inthe direction of the arrows and that the weight 8 is moving to the rightand printing-bed 9 to the left, the driving-wheel i will then be in meshwith the upper weightrack 10 and out of mesh with the lower weightrack11. Both of said racks are rigidly attached to said weight, whichreciprocates on rollers 12 in the frame 50 of the apparatus. i Vhen theweight 8 moves to the left, the printing-bed 9 is necessarily moved withan equal velocity to the right, this simultaneous movement being due toan oscillating gearwheel 13, which is axially and loosely mounted on thecylinder 6, as shown in Fig. 8, and is operatively connected at oppositeends of a diameter with both the printing-bed 9 and the weight 8,meshing with a bed-rack 14, depending from the printing-bed, and meshingwith an auxiliary rack 15, secured to the weight alongside the lowerweight-rack 11. The Weight will move to the right so long as the rack 10is in engagement with the driving gear-wheel 4:, since the latter movescontinu ously. \Vhen the end of the rack 10 arrives at the driving-wheelt, so that the propelling force of the latter on the former ceases, itwill then be necessary to positively arrest the movement of the weight,and therefore also of the printing-bed, instead of merely allowing it tocome to rest, and it will be necessary to control said further movement,reducing the speed gradually until the weight and printing-bed come torest and then starting them in the opposite direction and graduallyaccelerating their speed until they move in said opposite direction withthe same velocity as before derived from the driving-wheel 4.

In order to positively control the movement of the weight whilediminishing the speed to zero, there is mounted on the stud-shaft 5,side by side with the driving gear-wheel 4 and secured to saidgear-wheel, a segmental gearwheel 16, which is of the form of about halfan ellipse divided near the minor axis. This segmental. gear-wheel isarranged to engage alternately with two auxiliary racks 17, which aremounted on wedge-shaped blocks 18, extending upward from the lowerportion of the weight and downward from the upper overhanging portion 19thereof, so that said auxiliary racks l7 converge toward each other.They occupy positions which would be alongside of the upper and lowerracks if the latter were extended beyond their ends. They are thusadapted to engage the segmental gear 16, which, as already stated, issecured at the side of the driving gear-wheel at. The segmental gear 16is so secured to the gearwheel 4: that at the time the end of the rack10 arrives at the driving gear-wheel 4, and therefore goes out ofengagement therewith, the central point of the segmental gear 16 at theend of its major axis and farthest from the axis of revolution of saidgear is vertical and comes into engagement with the advancing end of theoblique upperauxiliary rack 17. Motion is now communicated to the weightno longer from the gearwheel 4 through the rack 10, but through themedium of the segmental gear 16 and the auxiliary rack 17, and this is aconstantly-diminishing motion, notwithstanding that the angular velocityof the gear-wheel 4 and segmental gear 16 is constant, because thedistance from the center of rotation to the point of transmission of themotion continually diminishes, owing to the elliptical form of segmentalgear and the oblique and downward direction of the upper rack 17.Provision must now be made for disengaging the segmental gear 16 fromthe upper auxiliary rack 17 and causing it to engage the lower auxiliaryrack, so as to produce a motion of the weight in the opposite direction.This is effected by means of a camgroove 30 in the gear-wheel 31 on thestudshaft 20, said wheel 31 being driven by a pinion 3 on the maindriving-shaft. In said camgroove 30 rides a roller 21, carried by a link22, having an end 23, forked to pass over the projecting end of theshaft 20 to be guided thereby, said link 22 being jointed, as at 24, toa bell crank-lever 25, pivoted at 26, and the other arm of said lever 25being jointed, as at 27, to a link 28, the upper end of which isconnected to a stud 32, eccentrically located on the end of a cylinder6. When the roller 21 passes from the high to the low dwell of thecam-groove 30, the link 22 is moved inwardly, thereby moving the link 28downwardly and rotating the cylinder downwardly through a small arc. Thestud-shaft 5, which, as before stated, is eccentrically carried on theother end of said cylinder 6, is thus depressed, thereby depressing alsothe gear-wheel 4 and the segmental gear 16, both of which are mounted onsaid stud-shaft 5. By this movement of the roller 21 in the cam-groove30, then, the segmental gear 16 is thrown out of engagement with theupper rack 17 and into engagement with the lower rack 17.

Rollers 34 are provided at and fixed to the end of the segmental gear16, and these rollers engage shoes 35 at the ends of the auxiliary racks17. The object of these rollers is to reduce friction while retainingcontrol of the Weight and printing-bed on changing from movement in onedirection of the reciprocation to the opposite and also to properlyaline the parts so that on making the change the teeth of the segmentalgear shall enter into mesh the teeth of the 3 lowerauxiliary rack 17. a

As shown-in Fig-. 1( the. cylinder 6 is suitably weighted on one side,as at 36, to compensate for the weight of the studs 32 and 5 and theparts carried'thereby. The'weight 8 at opposite ends carries pistons 3.738, and the printing-bed 9 carries at opposite ends pistons 39 40. Thepistons 37 39 are in alinement with each other, and at the end of themove, merit of the weight to the left and the printing-bed to the rightsaid pistons37 -39 enter opposite ends of a cylinder 41, fixedly securedto the frame 50, therebycompressing the airin said cylinder, whichcompressed air thus acts as a cushion to partly overcome the momenmaycounterbalance themomentum of the printing-b'ed,includingthe forms,asnearly as tum of theweight and printin'gbed. When the weight andprinting-bedmove in the other direction, the pistons 38 40' compress airin a cylinder 42 and efiect the same result.

In order that the momentum of the weight possible, there are providedauxiliary weights 49,,which-may be added to the weight as necessarytoequalize the weight of the printing- ,bed, when 'theforms are placedthereon.

The c'ounterbalancingof the momentum of the printing-bed may beaccomplished by employing not only a weight of equal mass traveling inthe opposite direction with equal 1 velocity, but also a weight of lessmass travthem whereby they reciprocate in opposite directions with equalvelocities, substantially as described.

2.: In an apparatus of .the character described, the combination of arotating shaft, a

'longitudinallyreciprocating body, a. Wheel driven by said shaft andoperatively connect- 7 ed alternately at opposite sides thereof withsaid body to reciprocate the same, a secondlongituditially-reciprocating body of substantially the same mass asthefirst, and an operative connection between them wherebytheyreciprocate in opposite directions with equal velocities,substantially-as described.

3. In an. apparatus of the 'character described, the combination of arotating shaft,

a gear-wheel thereon, a secondgear-wheel meshing with the first, alongitudinally-reciprocating'body, upper and lower racks thereon, meansoperated by the first-named shaft for moving the latter gear-wheel intomesh with said upper and lower racks alternately, a secondlongitudinally-reciprocating body, of substantially the; same massiasthe; first, and an operative connectionjbetweeli the two bodies wherebythey reciprocate in opposite directionswith equal velocities,substantially as described. i

4. In an apparatus of the character. 'de-. scribed, the combination of ashaft, a 'continuously-driven gear-wheel thereon, alongitudinally-reciprocating 'body, upper and lower racks thereon,'meansfOILIDOVlHg Sald shaft to bring said gear-wheel into meshyvith saidracks alternately, upper and lower auxiliary racks at each end of saidb0dy,;p'ro vided with the shoes 35, and a segmental gear, provided withthe rollers 34:, mounted on said shaft and engaging with said auxiliaryracks at points near the ends of the strokes, sub,-

stantially as described.

5.In an apparatus Ofthecharacter described, the combinationof a shaft 'acon;

tinuously-driven gear-wheel thereon; a longi-, 'tudinally-reciprocating"body, upper and lower racks thereon, means for movingsaid shaft to bringsaid gear-wheel into meshwith said racks alternately, upper and lowerauxiliary racks at each end of said body provided=with the shoes 35,said auxiliary racks being out of alinementwith the main racks,

and a segmental gear provided with the roll-f ers 34, mounted on saidshaft and engaging said auxiliary racks at points near theends of thestrokes, substantially as described. I

6. The combination of a printing-bed, a rack thereon, an oscillatinggear-wheel meshing with said rack,a weight having airacl; with whichsaid gear-wheel meshes on its opposite side, and meansforreciprocatingsaid weight, substantiallyas described 'l I 7. Thecombination of a printing-bed, a

rack thereon, an oscillating gear-wheel mesh.- ing with said rack,aweight having a rack with which said gear-wheel meshes on' its oppositeside, means for varying the weight to equalize itsmass with that of theprintings'ubst'antially as described.

' 8. The combination of a printing-bed, a

weight, means for reciprocatingtheweight,

IIO

'bed,and means for reciprocating said weight, M

and an operative connection between. the

weight and the printing-bed whereby thelatter is moved in theoppositedirection to the. former and with the same momentum, substantially asdescribed. I

9. The combinationof a printing-bed, a weight, means for varying themass of the weight, means for'reciprocating the weight,

and an operative connection between [the weight and the printing-bedwhereby the lat-j teris moved in'the opposite direction'fto the formerand with thesame momentum, sub

stantially as described.

10. The combination of a'printing-bed, a"

weight, means for reciprocatingfthe weight,

to rest, and for gradually increasing the speed at the beginning of thereciprocation, and an means for reducing the speed at'each ie'nd' of jits reciprocation gradually before bringing it &

operative connection between the weight and the printing-bed whereby thelatter is moved in the opposite direction to the former and with thesame momentum, substantially as described.

11. The combination of a printing-bed, a weight, means for reciprocatingthe weight, an operative connection between the printing bed and weightwhereby the latter is moved in the opposite direction to the former andwith the same momentum, and means carried by said bed and weight forreducing the shock on the stoppage of said bed and weight at the end ofthe stroke, substantially as described.

12. The combination of a printing-bed, a weight, means for reciprocatingthe weight, means for reciprocating the bed in the opposite direction tothe weight and with the same momentum,and means for reducing the shockon the stoppage of said reciprocating elements at the end of theirstroke, said means comprisingcylinders, and pistons arranged toentersaid cylinders at the ends of the stroke and compress the airtherein, substantially as described.

13. The combination of a driving gearwheel and a segmental gear rotatingtogether, a weight having upper and lower main racks and upper and loweroblique auxiliary racks, means operated at predetermined intervals forreciprocating the driving gear-wheel and segmental gear relatively tosaid upper and lower racks, whereby the gear-wheel and segmental gearare thrown out of engagement with the upper main and auxiliary racks andbrought into engagement with the lower main and auxiliary racks or viceversa, a printing bed, and an oscillating wheel driven by the weight anddriving the printing-bed in the opposite direction to the weight,substantially as described. 7

let. The combination of a rotating shaft, a gear-wheel mounted thereon,a driving gear- Wheel meshing with the first gear-wheel, a weight havingupper and lower racks, a camwheel driven by means of the rotating shaft,a lever operated by said cam-wheel to reciprocate the shaft of thedriving gear-wheel into mesh alternately with the upper and lower racksof the weight, oblique auxiliary upper and lower racks at the ends ofthe weight, a segmental gear reciprocated with the driving gear -wheel,and brought into mesh alternately with the upper and lower obliqueauxiliary racks, rollers carried by said segmental gear and engagingshoes on said weight, a printing-bed, a rack thereon, a rack on theweight, an oscillating gear-wheel engaging both of said latter rackswhereby the printing-bed and the weight move in unison in oppositedirections, cylinders, and pistons carried by said weight andprinting-bed and entering said cylinders in opposite directions at theends of a stroke, substantially as described.

In witness whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

EDWIN FRANCIS LEILICII. \Vitnesses:

FRANCIS M. WRIGHT, M. T. BEGLEY.

